Janine Kerkstra, PA-C
NPI 1851440424 · Physician Assistant · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Janine Kerkstra, PA-C is a Physician Assistant provider in Grand Rapids, MI (NPI 1851440424).
Provider details
- NPI number
- 1851440424
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- 5601004513 (MI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
189 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 165 | $78 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 24 | $54 |
Typical Medicare-allowed amounts for these services range $54–$78 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 55 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 195 | 33 |
| Trazodone Hcl | 166 | 38 |
| Duloxetine Hcl | 153 | 31 |
| Buspirone Hcl | 149 | 35 |
| Bupropion Hclbrand: Bupropion Xl | 146 | 32 |
| Lamotrigine | 119 | 15 |
| Olanzapine | 117 | 18 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-10
- Last updated
- 2023-12-22
- Certified
- 2023-12-22
Frequently asked questions
- What is Janine Kerkstra's NPI number?
- Janine Kerkstra's National Provider Identifier (NPI) is 1851440424, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Janine Kerkstra's specialty?
- Janine Kerkstra is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Janine Kerkstra located?
- Janine Kerkstra's practice location on file with NPPES is 300 68th St Se, Grand Rapids, MI 49548-6927.
- What is Janine Kerkstra's phone number?
- The practice phone number listed in the NPPES registry for Janine Kerkstra is (616) 455-5000.
- Does Janine Kerkstra accept Medicare?
- Janine Kerkstra is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Janine Kerkstra's NPI active?
- Yes — Janine Kerkstra's NPI (1851440424) is active in the NPPES registry as of the last update on 2023-12-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.